Pre-Algebra Lesson #30 How to Multiply Fractions
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In this lesson, we will learn how to multiply two or more fractions together. In order to multiply two or more fractions together, we will multiply the numerators and place this over the product of the denominators. Once we have our product, we will simplify the fraction. Alternatively, we can utilize a process known as cross canceling, which will prevent the double work of multiplying and then factoring to simplify. We will cancel any common factor between all numerators and all denominators before performing the multiplication. This will give us a simplified product.
00:00 Introduction
00:11 Procedure for Multiplying Fractions
00:43 Multiplying a Whole Number by a Fraction Explanation
03:18 Multiplying a Fraction by a Fraction Explanation
05:22 Multiplying Two Fractions without Cross Canceling Example
05:58 Multiplying Two Fractions with Cross Canceling Examples
11:54 Multiplying Three Fractions with Cross Canceling Examples
13:58 Multiplying Fractions by Whole Numbers Examples
18:08 Word Problems with Fractions
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